ON THE ZOOLOGICAL POSITION OF TEXAS. 37 



D. 1-8; A. 1-7-8; scales, 7-41-2-4. Eye large, horizontally oval, its 

 length 2.0G times in that of the head, and equal to interorbital width. 

 The muzzle is shortly decurved to the mouth, which is terminal and 

 short. The extremity of the maxillary bone extends half way from the 

 end of the muzzle to the line of the orbit. The length of the head is 

 contained in the total (with caudal fin) five and three- sevenths times, 

 and is 1™'° less than the depth of the body at the ventral fin. The 

 origin of the latter is below or a little in advance of the base of the 

 first dorsal ray. The pectoral is short, not nearly reaching the ventral, 

 which in turn falls far short of the vent. The lateral line rises ante- 

 riorly. The occipital region is convex and rather wide ; the interorbital 

 region nearly flat. Dorsal region dusky; a wide dusky lateral baud, 

 sej)arated by a pale band from the dorsal shading. An inconspicuous 

 black dot at the base of the caudal fin. The fins generally pale yellow, 

 and without spots. The bands and shades of the body are continued 

 on the head. Length m. .07G. 



This fish differs from the H. sidcrius* Cope, in its much larger scales. 

 I found it to be abundant in the Johnson's Fork of the Llano, in Kimble 

 County. 



Hybognathus nigrotceniata sp. nov. This species nearly resembles the 

 last, but differs in its considerably' larger scales, relatively rather shorter 

 body, and longer fins. The formulte are : D. 1-8 ; A. 1-8 ; scales 5-34-3, 

 or fewer than in the II. argyritis. The head is one-fifth the length, in- 

 cluding the caudal fin, and about equal to the depth at the ventral fin. 

 The latter originates a little in advance of the line of the first dorsal ray. 

 The diameter of the eye is large, a little less than one-third the length 

 of the head, and a little less than the interorbital width. The ventral 

 fin nearly reaches the vent. 



In color and other respects the description of the H. fiavipinnis is ap- 

 plicable to the present species. I may modify this by the observation 

 that the lateral band is blacker in the present species, and there is no 

 evidence that the fins were yellow. The size is less. Length of the 

 largest specimen m. .06G. 



This cyprinoid is abundant in the ui^per waters of Wallace Creek, 

 one of the heads of the Medina. 



Cochlognathns higuttata sp. nov. The genus CocJilognafJius of Baird and 

 Girard was stated by Girard to be related to Fimejyhales, and to have 



*Tliis siiecies is a Hi/hognatlnis. Tkrongh some unaccountable oversiglit it was re- 

 ferred to Hyhoi-Jujnchus iu Vol. V, Report Lieutenant Wheeler, ]}. 670, 



